✨(visio) use compatible with summary v2

This commit introduces the compatibility with summary v2.
It tecnically doesn't break the compatibility with v1 as
v1 params are still sent. But we advise people using the
transcribe feature in their own deployments to adapt to the
new v2 API, as this compatibility will be removed in a
future major version.

* RecordingStatusChoices now has
EXTERNAL_PROCESS_SUCCESSFUL
& EXTERNAL_PROCESS_FAILED
Values, which are changed by a new webhook that
can be called by the transcribe service.
This webhook is protected by its own bearer token.
* Title for the document is computed in visio,
* Tests are added / updated accordingly

src/backend/core/models.py

@@ -60,6 +60,11 @@ class RecordingStatusChoices(models.TextChoices):
     FAILED_TO_START = "failed_to_start", _("Failed to Start")
     FAILED_TO_STOP = "failed_to_stop", _("Failed to Stop")
     NOTIFICATION_SUCCEEDED = "notification_succeeded", _("Notification succeeded")
+    EXTERNAL_PROCESS_SUCCESSFUL = (
+        "external_process_successful",
+        _("External process successful"),
+    )
+    EXTERNAL_PROCESS_FAILED = "external_process_failed", _("External process failed")
 
     @classmethod
     def is_final(cls, status):
@@ -73,6 +78,8 @@ class RecordingStatusChoices(models.TextChoices):
             cls.STOPPED,
             cls.SAVED,
             cls.ABORTED,
+            cls.EXTERNAL_PROCESS_SUCCESSFUL,
+            cls.EXTERNAL_PROCESS_FAILED,
             cls.FAILED_TO_START,
             cls.FAILED_TO_STOP,
         }
@@ -598,6 +605,14 @@ class Recording(BaseModel):
         verbose_name=_("Recording options"),
         help_text=_("Recording options"),
     )
+    external_process_id = models.CharField(
+        max_length=255,
+        null=True,
+        blank=True,
+        unique=True,
+        verbose_name=_("External Process ID"),
+        help_text=_("ID of the external process associated with the recording."),
+    )
 
     class Meta:
         db_table = "meet_recording"
@@ -653,6 +668,8 @@ class Recording(BaseModel):
         return self.status in {
             RecordingStatusChoices.NOTIFICATION_SUCCEEDED,
             RecordingStatusChoices.SAVED,
+            RecordingStatusChoices.EXTERNAL_PROCESS_SUCCESSFUL,
+            RecordingStatusChoices.EXTERNAL_PROCESS_FAILED,
         }
 
     @property